I've been listening to the same stuff for a while and my friends haven't been a big help in suggesting artists in genres other than death metal and dubstep, so I figured I'd ask you guys. It doesn't matter if suggestions are old or new artists. Here is what I primarily listen to:

To be truly honest, it is really hard to figure out your taste in music just from you listening to those bands. Those are like the "Classics", just about everyone likes at least half of those, idk I'm trying to figure out how to help just don't know where to start

For some more current bands: Black Country Communion (mandatory if you're into you're into classic rock. Opeth's last album "Heritage" (you most likely won't like their old stuff). Muse. The Black Keys. Chickenfoot.